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Title: The impact of thienothiophene isomeric structures on the optoelectronic properties and photovoltaic performance in quinoxaline based donor-acceptor copolymers
Authors: Singh, Ranbir R. 
Pagona, Georgia 
Gregoriou, Vasilis G. 
Tagmatarchis, Nikos 
Toliopoulos, Dimosthenis ItemCrisRefDisplayStrategy.rp.deleted.icon
Han, Yang 
Fei, Zhuping 
Katsouras, Athanasios 
Avgeropoulos, Apostolos 
Anthopoulos, Thomas D. 
Heeney, Martin 
Keivanidis, Panagiotis E. 
Chochos, Christos L. 
Keywords: Heterojunction solar-cells;Band-gap copolymers;Conjugated polymers;Charge-transport;Semiconducting polymers;Organic electronics
Category: Chemical Sciences
Field: Natural Sciences
Issue Date: 28-Apr-2015
Publisher: Royal Society of Chemistry
Source: Polymer Chemistry, 2015, Volume 6, Issue 16, Pages 3098-3109
metadata.dc.doi: 10.1039/c5py00075k
Abstract: The influence of the monomer's isomeric structure on the optical, electrochemical, charge transporting properties and photovoltaic performance of donor-acceptor (D-A) conjugated polymers has been demonstrated for the first time by studying two D-A copolymers consisting of bis(3-octyloxy)phenyl)quinoxaline as the electron deficient unit and the two isomeric structures of thienothiophene (thieno[3,2-b]thiophene and thieno[2,3-b]thiophene) as the electron rich units. The drastic effect of incorporating two different isomeric structures on the polymer backbone of these copolymers, manifests in changes observed in their optical, electrochemical and charge transporting properties. In contrast, the overall photovoltaic performance of the copolymers is similar, but distinct differences in the device photocurrents occur. These differences were attributed to morphology variations rather than the balanced mobility ratio. For further developments in the field, the isomeric structures of different functional monomers should be considered in the designing of new materials with even superior performance.
ISSN: 17599954
Rights: © 2015 The Royal Society of Chemistry.
Type: Article
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